linux-kernel - Re: [X86] Remove unnecessary code in 64bit CPU identification.

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Message-ID: <4833112F.7020402@zytor.com>
Date:	Tue, 20 May 2008 10:58:07 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Dave Jones <davej@...hat.com>, "H. Peter Anvin" <hpa@...or.com>,
	Linux Kernel <linux-kernel@...r.kernel.org>,
	Ingo Molnar <mingo@...e.hu>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [X86] Remove unnecessary code in 64bit CPU identification.

Dave Jones wrote:
> On Tue, May 20, 2008 at 07:46:57AM -0700, H. Peter Anvin wrote:
>  > Dave Jones wrote:
>  > > There were no 64bit Transmeta CPUs made (and it'd be something of
>  > > a surprise if they started any time soon).   To the best of my knowledge,
>  > > no CPU vendor cloned the 80860000 cpuid space claimed by Transmeta.
>  > > By removing this code, we can also eliminate calling cpuid 0x80000007 twice.
>  > > 
>  > > Signed-off-by: Dave Jones <davej@...hat.com>
>  > 
>  > I'd really like to avoid divergences between the 32-bit and 64-bit code 
>  > if they can be avoided at this point.  These codes need to be unified, 
>  > not further split.
> 
> Umm, the 32 bit code has the per-vendor stuff removed from setup.c, and factored
> out into per-vendor files in arch/x86/kernel/cpu/  Because the 64bit version
> doesn't do that (yet), my removal of this code actually gets us closer to unification.
> After my patch, neither of the setup.c files have the Transmeta bits :)
> 

*Shrug* ... it seems like pointless churn to code that really needs to 
die to me.

	-hpa
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